Programmer Group

1, Environment introduction Operating system introduction: ubuntu 18.04 FFMPEG version: 4.4.2 Camera: USB camera, virtual machine attached camera of the machine 2, Download and compile FFMPEG and X264 X264 download address: http://www.videolan.org/developers/x264.html FFMPEG download address: ...

Response output - > write prototype self.write() function This is how it is defined in the source code def write(self, chunk: Union[str, bytes, dict]) -> None: Effect Write chunk data to buffer Four ways to refresh buffer Program interrupt Manual refresh Buffer full Encounter \n When you write a print, it is not directly displayed on t ...

Ansible's specified user and password login, secret-free login, specified ssh port, and host list Inventory configuration It is not necessary to modify the ansible configuration in practice, or it is only necessary to modify the ansible configuration. Add user account Explain: 1. Login accounts used by operations and maintenance personnel; 2 ...

The iostat command reports cpu statistics and disk i/o statistics. The iostat command monitors the i/o load of the system by observing the actual working time of the storage devices and their average transmission rate. This does not need root permission, and the data source can be obtained directly by a ...

1. Preface Redis is the largest cache middleware we use today, and it is widely used because of its powerful, efficient and convenient features.Redis released 3.0.0 in 2015, officially supporting redis clusters.This brings an end to the era of redis without clusters, which used to be Twemproxy published by twitter and codis developed by pea po ...

Link to the general outline of this series of articles: surface flinger series of articles of Android GUI system Summary & description of key points in this chapter: The mind map of this chapter is as above. This paper mainly introduces the concept of FrameBuffer, mainly focuses on the basic ...

1. Installation address 1) Flume official website address http://flume.apache.org/ 2) Document view address http://flume.apache.org/FlumeUserGuide.html 3) Download address http://archive.apache.org/dist/flume/ 2. Installation and deployment 1) Upload apache-flume-1.7.0-bin.tar.gz to the / opt/softwa ...

Port mappings are associated with containers In addition to network access, docker provides two capabilities to meet the basic requirements of service access: one is to allow mapping of service ports applied within containers to local host hosts, and the other is to enable quick access through container names between multiple containers throug ...

Implementation of music player based on madplay library linux Application Programming The system can realize the following functions: play, pause, continue, stop, last song, next song, volume adjustment and exit. Using madplay library to realize a simple music player, which can play local audio files ...

Currently, docker is very popular. Of course, compared with k8s, docker is slightly less powerful, but it is still widely used and convenient. Here are two ways to install docker First type: yum source installation This method is relatively simple to install, but first make sure that yum is install ...